Selection from Arcana Coelestia ~ Emanuel Swedenborg
That which is from self-intelligence is in itself void of life, nay, is spiritually dead, for man's own is nothing but evil; and therefore if Divine worship is performed from it, this worship is nothing else than the worship of an idol, graven or molten, wherein there is no spirit, that is, no life. But that which is from the Word is alone serviceable for Divine worship, because it is in itself alive. For within everything of the Word there is a spiritual sense, which treats of the Lord's kingdom; and within this sense is the Divine, because the Word in its inmost sense treats of the Lord alone; from this is the sanctity and the life of the Word, and not from any other source.The Word is like a Divine man — the literal sense is as it were his body, but the internal sense is as it were his soul; which shows that the literal sense has life through the internal sense. It appears as if the literal sense vanishes or dies through the internal sense; but on the contrary it does not vanish, still less dies; but through the internal sense it lives. From all this it is now evident that worship truly Divine has its existence from those things which are of the Word, and in no case from those things which are of self-intelligence. Hence it is that by "if thou move a tool upon the altar thou wilt profane it," is signified, if thou devise not from the Word, but from self-intelligence such things as must be of Divine worship, there is no worship.
It is believed in the world that a man is able to know from the light of nature, thus without revelation, many things that belong to religion; as that there is a God, that He is to be worshipped, and also that He is to be loved, likewise that man will live after death, and many other things that depend upon these; and yet these things being such as are from self-intelligence. But I have been instructed by much experience that of himself, and without revelation, man knows nothing whatever about Divine things, and about the things that belong to heavenly and spiritual life. For man is born into the evils of the love of self and of the world, which are of such a nature that they shut out the influx from the heavens, and open influx from the hells; thus such as make man blind, and incline him to deny that there is a Divine, that there is a heaven and a hell, and that there is a life after death. This is very manifest from the learned in the world, who by means of knowledges have carried the light of their nature above the light of others; for it is known that these deny the Divine, and acknowledge nature in place of the Divine, more than others; and also that when they speak from the heart, and not from doctrine, they deny the life after death, likewise heaven and hell, consequently all things of faith, which they call bonds for the common people.
From this it is plain what is the quality of the light of nature without revelation. It has also been shown that many who have written upon natural theology, and from the light of their nature have skillfully confirmed those things which belonged to the doctrine of their church, in the other life at heart deny these same things more than others do; and also deny the Word itself, which they attempt utterly to destroy; for in the other life hearts speak. It has also been shown that the same can receive nothing of influx out of heaven, but only from the hells. Hence it was plain what is the quality of the light of nature without revelation; consequently what is the quality of that which comes from man's own intelligence.
But two considerations have arisen which bring the mind into doubt upon this subject:
First, that the ancients who were Gentiles nevertheless knew that there is a Divine, that this is to be worshiped, and that man as to the soul is immortalBut as regards the ancients, they did not know these things from the light of their own nature, but from revelation, which had spread from the church even unto them; for the Lord's church had been in the land of Canaan from the most ancient times. From this source such things as pertained to Divine worship spread to the nations round about, and likewise to the neighboring Greeks, and from these to the Italians or Romans. From this source both Greeks and Romans had knowledges about the Supreme Deity, and the immortality of the soul, of which their learned men wrote.
Second, that these things are known also to many nations at this day, with whom there is no revelation.
As regards the nations at this day who also know that there is a Divine, and that there is a life after death, these have not had this knowledge from the light of their own nature, but from a religiosity derived by them from ancient times, which had been founded on such things as had spread in various ways from the church, which had revelation. This was of the Lord's Divine Providence. Moreover, those of them who from their religiosity acknowledge a Divine over all things, and from their religiosity perform the duties of charity to their neighbor, when instructed in the other life receive the truths of faith, and are saved.
(from Arcana Coelestia 8943, 8944)